this year, some 50,000 people in the united states will wake up and sense something's wrong. they're more likely to be men than women, more likely to be people my age. but sometimes that unwelcome wakeup call arrives when you're young, when your career is just taking off. >> since you're obviously not a patient and i'm not getting anywhere, can you tell me where i can find a guy named lou who drives an ambulance, and i'll get out of your life. >> i'm lou. >> i was doing a film in florida and was partying pretty good, and was used to waking up not in great shape. but i woke up one morning, and my pinky was twitching, and it was just persistent. and i just... i realized that there was just nothing i could do to stop it. and i thought, is this like dts? who gets dts in a pinky? you know, with a lot of injury or a lot of catastrophic illness, it's like stepping off a curb and getting hit by a bus. but with parkinson's, it's like actually being stuck in the middle of the road while a bus is coming, and you can hear it, you have no idea how big it is, you have no idea how fast it's